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With the sharp increasing demand of the indoor coverage and network capacity, dense femtocells are the ultimate target of the femto cellular network deployment in urban environment However, dense femtocell deployment could introduce excessive inter-femtocell interference (IFI). To address this problem, this paper proposes a distributed power self-optimization scheme for the downlink of dense femtocell...
This paper presents a game-theoretic approach of power allocation in two-tier OFDMA femtocell networks. A dual-utility based non-cooperative game with pricing is formulated for effectively allocating power on each sub-channel, targeting at maximizing energy efficiency for each macro BS and protecting the SINR for each femto BS for customers' interests, under power constraints in each sub-channel....
Interference management is one of the most important issues in two-tier femtocell networks in which a central macrocell underlaid with several femtocell hotspots. To address the cross-tier and co-tier interference, this paper introduces an energy-efficient power control algorithm via convex pricing scheme, where both circuit and transmit power have been considered. To achieve the target SINR, the...
Due to large-scale and self-deployed of femtocells overlaid on traditional cellular networks, serious cross- and co-tier interference may arise without good coordination. To address this problem, this paper proposes a distributed power control scheme for the uplink transmission of two-tier OFDMA femtocell networks. Two models are considered: single-channel femtocell networks and multiple-channel femtocell...
This paper investigates the downlink power allocation problem to mitigate the cross- and co-tier interference in the spectrum-sharing two-tier OFDMA femtocell network, which are comprised of macrocells underlaid with femtocells. The problem is formulated as a non-cooperative game with dual-utility. To achieve green radio access, the objective of the utility for each macro BS is to maximize its energy...
Femtocell is an effective technology to improve the system performance. In this paper, we address the problem of sub-channels allocation in OFDMA two-tier femtocell networks. Our objective is to maximize the rate sum of multiple femtocells with consideration of cross-tier interference between macrocell and multiple femtocells. A resource optimization approach based on Ant Colony Optimization Algorithm...
In order to suppress cross-tier interference (CTI) and inter-cell interference (ICI) between adjacent macrocells, this paper proposes an effective resource allocation scheme for the two-tier OFDMA femtocell networks, in which macro BSs adopt the soft frequency reuse (SFR) strategy. Consider that macrocell users (MUEs) are prior to femtocell users (FUEs), firstly the subbands are allocated to MUEs...
Femtocell is a small access point using the wire broadband connections or wireless technologies to access the mobile operator's network for the user equipment(UE), which can provide better indoor coverage and satisfy the upcoming demand of high data rate for wireless communication system.Femtocell related handover cost reduction is one of the important targets in LTE-Advanced SON (Self-Organising...
Home eNodeB (HeNB) is a low-power access point using the local broadband connections or a separate RF backhaul to access the mobile operator's network for the user equipment(UE), which can provide better indoor coverage and satisfy the upcoming demand of high data rate for users. Considering the potential frequent mobility between HeNB-HeNB and HeNBeNB, HeNB mobility enhancement is proposed as one...
The femtocell networks that use Home eNodeB and existing networks as backhaul connectivity can fulfill the upcoming demand of high data rate for wireless communication system as well as can extend the coverage area. It is also of interest to minimize operational effort by introducing self-optimizing mechanisms, and the optimization of the Home eNodeB involved handover is an important goal of LTE-Advanced...
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